Branch: i30_pythongeometry | Intent: Create module of native Python functions to
	replace numpy functions used in eppy geometry modules
Commit Intent: Modify test_py_numeric.py to test edge cases of vctr_dot() function
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*eppy/tests/geometry_tests/test_py_numeric.py
-Added same set of 3 failure tests for vctr_dot() function...

**py.test: PASS
**pep8: PASS
Branch: i30_pythongeometry | Intent: Create module of native Python functions to
	replace numpy functions used in eppy geometry modules
Commit Intent: Modify docstrings for functions in py_numeric.py to clarify functionality
	(using numeric.py from the numpy library as an example)
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*eppy/geometry/py_numeric.py
-Modified vctr_cross() docstring's mathematical description to use locally defined
 variables ('a' & 'b' references were residual from numpy copy-paste)...
-Added a copy of the cross product function's docstring, changed name references...

*eppy/tests/geometry_tests/test_py_numeric.py
-Added comment at the beginning of each set of tests targeted at a specific function...
-Revised docstrings of test functions...

**py.test: PASS
**pep8: PASS